size_to_string
static int size_to_string(uint64_t size, char *string, int len);
if (size_to_string(attrp->capacity, capacity, 8) != SUCCESS) {
if (size_to_string(attrp->size, size, 8) != SUCCESS) {
if (size_to_string(attrp->capacity, capacity, 16) != SUCCESS) {